1. Stipe Miocic (18-2)
Doubt Miocic at your own risk. One of the most dominant heavyweights of all time went into his record-breaking third title defense in January as a betting underdog. When the dust settled, it was still Miocic on top.Next: UFC 226 on July 7, vs. Daniel Cormier

2. Francis Ngannou (11-2)
Ngannou's bid for UFC gold came up short against Stipe Miocic in January, but only a fool would jump off this bandwagon. Ngannou lost to a versatile, experienced foe in Miocic -- who we are now calling the best heavyweight of all time. That's nothing to hang your head over. Ngannou's future remains bright.Next: TBD

3. Alistair Overeem (43-16)
Overeem's KO loss to Francis Ngannou at UFC 218 will only show up on his record as a single loss, but it will be interesting to see how much weight it carries moving forward. Overeem is as experienced as they come, but even so, that kind of loss has the potential of a lasting effect.Next: UFC 225 on June 9, vs. Curtis Blaydes

4. Alexander Volkov (30-6)
Volkov capitalized on a major opportunity in March, when he knocked out former UFC champion Fabricio Werdum in the fourth round. Volkov had already won five in a row going into that bout, but he needed a big name victory. Werdum is that big name.Next: TBD

5. Fabricio Werdum (23-8-1)
Werdum's tried all of his usual tricks on Alexander Volkov in March, but it wasn't enough to top the Russian contender. There's no reason to worry too much about Werdum yet, but he is on the plus-side of 40 now.Next: TBD

6. Cain Velasquez (14-2)
A healthy Velasquez is the best Velasquez. The former champion looked terrific in an absolute drubbing of Travis Browne in July. If he can stay healthy, he's a good bet to reclaim the UFC heavyweight title he has already won twice before.Next: TBD

7. Junior dos Santos (18-5)
Sometimes you're the hammer, sometimes you're the nail. That's the heavyweight division. Dos Santos isn't done by any means, but he has had some rough nights in the Octagon. UFC 211 against Stipe Miocic was one of them.Next: TBD

The Russian heavyweight was stripped of his Bellator MMA title in 2016 due to inactivity. He has since found a home competing in his native Russia, recently defeating Antonio "Bigfoot" Silva there, and remains unbeaten now for seven years.Next: TBD

9. Curtis Blaydes (9-1)
A former junior college wrestling champion, Blaydes has found his groove in the UFC. After suffering a TKO loss to Francis Ngannou in his UFC debut in 2016, Blaydes is 4-0, including a signature win over Mark Hunt in Australia. Momentum is currently on this Chicago native's side.Next: UFC 225 on June 9, vs. Alistair Overeem

Lewis pulled out a late finish against Marcin Tybura, at a UFC Fight Night event in February. The man's victories aren't always pretty, but no one can doubt the knockout power. It's always there, even when our man looks completely gassed. We look forward to what's next.Next: TBD